EP0435818B1 - Vorrichtung zum Schweissen und/oder Beschichten von Werkstücken, Düse für eine derartige Vorrichtung sowie Manipulator für die Düse einer derartigen Vorrichtung - Google Patents

Vorrichtung zum Schweissen und/oder Beschichten von Werkstücken, Düse für eine derartige Vorrichtung sowie Manipulator für die Düse einer derartigen Vorrichtung Download PDF

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Publication number
EP0435818B1
EP0435818B1 EP90810856A EP90810856A EP0435818B1 EP 0435818 B1 EP0435818 B1 EP 0435818B1 EP 90810856 A EP90810856 A EP 90810856A EP 90810856 A EP90810856 A EP 90810856A EP 0435818 B1 EP0435818 B1 EP 0435818B1
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EP
European Patent Office
Prior art keywords
nozzle
laser beam
laser
axis
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90810856A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0435818A1 (de
Inventor
R. Dr. Dekumbis
Jean-Daniel Wagniere
Charles Marsden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Markets and Technology AG
Original Assignee
Sulzer Innotec AG
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Publication date
Application filed by Sulzer Innotec AG filed Critical Sulzer Innotec AG
Publication of EP0435818A1 publication Critical patent/EP0435818A1/de
Application granted granted Critical
Publication of EP0435818B1 publication Critical patent/EP0435818B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/144—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing particles, e.g. powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/324—Bonding taking account of the properties of the material involved involving non-metallic parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • B23K2103/52—Ceramics

Definitions

  • the present invention relates to a device for welding workpieces or at least partially coating workpieces, in particular for coating metallic surfaces of workpieces with a laser device.
  • Welding i.e. Metal workpieces can be connected using laser beams, which are used as an energy source (MIG / TIG).
  • the welding material can be blown into the resulting weld in powder form or fed in the form of a rod.
  • US Pat. No. 4,835,375 describes a welding process for metal sheets, in which a nozzle for the coating material is attached to a laser support with a holder (not described in more detail). The position of the nozzle relative to the laser beam or laser support cannot be changed during operation.
  • the object of the invention is to provide a laser device with which welded joints of various curve shapes and largely constant quality can be produced in a simple manner even on workpieces with complicated body contours without the need for special manipulators of high performance for the workpiece.
  • Another object of the invention is to provide a laser device for surface coating (build-up welding), which allows even on workpieces with a complicated surface shape, with simple manipulators such as low-power XY tables, complicated coating patterns and layers of largely constant quality produce.
  • Another object of the invention is to provide a moving device for the nozzle, as well as a nozzle for a laser device, which enables an improved yield of the powder material and which admixes welding powder into the weld seam or surface layer, or the blowing of Protective gas allowed to be minimized.
  • a molten area of the layer forms on the surface of the workpiece, in the working area of the laser beam, which is also called the bath or melting pool.
  • the position of the powder jet is advantageously chosen such that its axis of symmetry meets the surface of the workpiece at a point E P (puncture point of the powder) that is a few millimeters from the intersection E L (puncture point of the laser) of the axis of symmetry of the laser beam and the surface. eg typically up to about ⁇ 3 mm away.
  • This distance is essentially determined by the geometry of the bath, which in turn depends, for example, on the type of powder used, the shape and energy of the laser beam, the strength of the powder beam and the layer thickness to be produced.
  • the device according to the invention now allows the once selected values for the angles ⁇ and ⁇ and the distance from E P to E L , as well as the distance of the nozzle opening from To keep points E P largely constant, regardless of the direction of travel of the laser beam on the surface of the workpiece. This leads to surface layers with significantly more uniform properties such as thickness and composition (mixing).
  • the selected positions which remain the same during coating, can be set, for example, with a correspondingly programmed CNC control (Computerized Numeric Control), as used in machine tools.
  • CNC controls are able to keep the selected and set parameters constant regardless of the direction of travel of the laser beam on the workpiece surface by means of tangential tracking.
  • the laser device for welding or coating workpieces has a nozzle with which gas and / or powdery coating material is blown into the working area of the laser beam.
  • the powder is melted into layers on the surface of the workpiece or serves as a connecting welding agent when welding parts.
  • Laser beam and direction of movement of the laser beam on the surface of the workpiece, as well as transverse direction to the direction of movement determine a coordinate system with the origin at the point of incidence of the laser beam on the surface of the workpiece.
  • a controllable and adjustable device in the coordinate system keeps the position of the nozzle largely constant even with complicated relative movements of the laser beam and workpiece, which allows welded connections and welded layers of complicated shape and largely homogeneous quality to be produced.
  • the controllable manipulator for the nozzle allows the axial and radial position of the nozzle to be set and kept constant with respect to the laser beam and its working area with the bath of liquid Layer material.
  • the nozzle has a step-like constriction which transfers from a first cylindrical part to a second, narrower cylindrical part.
  • the device is also suitable for inert gas welding, in that only the inert gas, e.g. Helium, argon, nitrogen, and the welding material e.g. is blown in rod form or also powdered welding filler material with the protective gas of the welding point.
  • inert gas e.g. Helium, argon, nitrogen
  • the welding material e.g. is blown in rod form or also powdered welding filler material with the protective gas of the welding point.
  • workpieces made of non-metallic material such as e.g. Ceramic to apply a metallic or non-metallic layer, just as it is possible to apply a non-metallic layer, e.g. to apply a ceramic layer.
  • the laser device 1 shows the laser device 1 for coating surfaces of workpieces.
  • the CNC controller 10 controls the CO2 laser 11.
  • the laser beam 110 is directed onto the workpiece 12 via laser optics 111.
  • the last mirror 111 'of the laser optics 111 is a concave mirror e.g. Parabolic mirrors designed and focused the laser beam 110 on the work area 1112 of the workpiece 12.
  • the workpiece 12 is attached to the movement table 13 which can be moved in three coordinate directions, the movements of which are determined by the CNC control.
  • the powder axis P strikes the LQ level above the FQ level 22, here it is offset upwards by a few millimeters from the surface of the workpiece 22 (vertical offset V V ).
  • the powder jet P is offset by the distance V H from the laser axis (horizontal offset V H ). It is thereby achieved that the powder jet P is directed directly onto the central part of the bath 26 of the layer 24, the welding bead.
  • the angles of the powder jet P to the FQ or FL plane are denoted by ⁇ or ⁇ .
  • the CNC control is programmed in such a way that, for example, the mutual position between powder jet P, laser beam L and workpiece 22 is at least approximately maintained at all times.
  • the distance from the opening of the nozzle 25 to the surface of the bath 26 is, in the jet direction, typically in a range from 3 to 40 mm.
  • the vertical offset V V based on the FQ plane, can be in the range of approximately -1 and +9 mm, depending on the choice of the angle ⁇ .
  • the horizontal offset V H is, based on the plane that runs through the origin, typically in the range of approximately ⁇ 3 mm.
  • the layer thicknesses that are applied to the surface of the workpiece are usually in Range of fractions of a millimeter and a few millimeters, for example between 0.2 and 2 mm.
  • the vertical offset V V of the powder jet P of the nozzle 45 is clearly visible in the side view of FIG. 4.
  • the liquid bath 46 of the surface layer in the working area of the laser beam L is hit centrally by the powder jet P of the nozzle 45.
  • the powder is thus melted in the powder jet P with better efficiency to form the bead or surface layer 44, which means an improved material yield.
  • the nozzle 7 of FIG. 7 narrows in the cross section 70 from the cross section with the diameter D A to the cross section with the diameter D B.
  • the nozzle 7 narrows when viewed in the jet direction P to a circular cylindrical part with a smaller diameter D B.
  • the narrowing advantageously takes place at an angle ⁇ in the range from 90 ° to 150 °.
  • the diameter D A can range from 1 to 5 mm.
  • the narrower diameter D B is - depending on the diameter D A - in the range of about 0.5 to 2.5 mm.
  • the lengths P A and P B are advantageously in the order of 15 to 90 mm or 15 to 120 mm.
  • a metal, such as copper or ceramic, is suitable as the material for the nozzle body 71.
  • the nozzle jet ie the powder jet or the protective gas jet, is more or less focused. Provision can also be made to arrange the nozzle channel and the nozzle opening 700 asymmetrically in the nozzle body (71).
  • the 8 shows a laser device 8 with flying optics, ie the laser beam direction can be directed within wide limits in space.
  • the beam L of the laser is deflected via the mirror 80 and finally focused by the concave mirror 80 '.
  • the manipulator 85 for the nozzle 85 ' allows the axial displacement and rotation of the nozzle 85' around the laser beam L.
  • the device shown also has an XY table 82 for moving a workpiece to be machined in the working area of the laser beam L. Die Movement possibilities of the laser system and the manipulator are indicated with arrows.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
EP90810856A 1989-12-27 1990-11-07 Vorrichtung zum Schweissen und/oder Beschichten von Werkstücken, Düse für eine derartige Vorrichtung sowie Manipulator für die Düse einer derartigen Vorrichtung Expired - Lifetime EP0435818B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH465889 1989-12-27
CH4658/89 1989-12-27

Publications (2)

Publication Number Publication Date
EP0435818A1 EP0435818A1 (de) 1991-07-03
EP0435818B1 true EP0435818B1 (de) 1994-06-15

Family

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Family Applications (1)

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EP90810856A Expired - Lifetime EP0435818B1 (de) 1989-12-27 1990-11-07 Vorrichtung zum Schweissen und/oder Beschichten von Werkstücken, Düse für eine derartige Vorrichtung sowie Manipulator für die Düse einer derartigen Vorrichtung

Country Status (5)

Country Link
US (1) US5147999A (es)
EP (1) EP0435818B1 (es)
JP (1) JPH03198994A (es)
DE (1) DE59006143D1 (es)
ES (1) ES2056430T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4186616A4 (en) * 2020-07-22 2024-05-01 Nikon Corporation PROCESSING SYSTEM

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JP2591371B2 (ja) * 1991-07-03 1997-03-19 三菱電機株式会社 レーザ加工装置
FR2688803B1 (fr) * 1992-03-23 1994-05-06 European Gas Turbines Sa Procede de revetement d'une encoche d'une piece en alliage de nickel par laser.
US5601735A (en) * 1992-04-13 1997-02-11 Hitachi, Ltd. Long-sized tubular grounding container unit for gas-insulated electrical device and laser welding device for manufacturing the same
US6779449B1 (en) * 1994-09-15 2004-08-24 Man Roland Druckmaschinen Ag Carrying sleeve for printing and transfer forms and a process for production of such a carrying sleeve
US5914059A (en) * 1995-05-01 1999-06-22 United Technologies Corporation Method of repairing metallic articles by energy beam deposition with reduced power density
US5900170A (en) * 1995-05-01 1999-05-04 United Technologies Corporation Containerless method of producing crack free metallic articles by energy beam deposition with reduced power density
US6350326B1 (en) 1996-01-15 2002-02-26 The University Of Tennessee Research Corporation Method for practicing a feedback controlled laser induced surface modification
US5961861A (en) * 1996-01-15 1999-10-05 The University Of Tennessee Research Corporation Apparatus for laser alloying induced improvement of surfaces
US5748691A (en) * 1996-03-11 1998-05-05 General Electric Company Apparatus and methods for sealing end plugs for nuclear fuel rods
US6476343B2 (en) * 1996-07-08 2002-11-05 Sandia Corporation Energy-beam-driven rapid fabrication system
KR100448532B1 (ko) * 1998-09-14 2004-11-26 현대중공업 주식회사 레이저를이용한보론첨가오스테나이트계스테인레스강용접부의연성향상용접방법
US6294225B1 (en) 1999-05-10 2001-09-25 The University Of Tennessee Research Corporation Method for improving the wear and corrosion resistance of material transport trailer surfaces
US6173886B1 (en) 1999-05-24 2001-01-16 The University Of Tennessee Research Corportion Method for joining dissimilar metals or alloys
US6299707B1 (en) 1999-05-24 2001-10-09 The University Of Tennessee Research Corporation Method for increasing the wear resistance in an aluminum cylinder bore
US6497985B2 (en) 1999-06-09 2002-12-24 University Of Tennessee Research Corporation Method for marking steel and aluminum alloys
US6284067B1 (en) 1999-07-02 2001-09-04 The University Of Tennessee Research Corporation Method for producing alloyed bands or strips on pistons for internal combustion engines
US6423162B1 (en) 1999-07-02 2002-07-23 The University Of Tennesse Research Corporation Method for producing decorative appearing bumper surfaces
US6328026B1 (en) 1999-10-13 2001-12-11 The University Of Tennessee Research Corporation Method for increasing wear resistance in an engine cylinder bore and improved automotive engine
US6229111B1 (en) 1999-10-13 2001-05-08 The University Of Tennessee Research Corporation Method for laser/plasma surface alloying
US6531675B2 (en) 2001-01-31 2003-03-11 Unova Ip Corp. Laser welding method and apparatus
DE10316966A1 (de) * 2003-04-12 2004-10-28 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zum Wiederaufbauen flächig ausgebildeter beschädigter Bauteile
US20050023256A1 (en) * 2003-07-31 2005-02-03 Srikanth Sankaranarayanan 3-D adaptive laser powder fusion welding
US7051645B2 (en) * 2004-06-30 2006-05-30 Briggs & Stratton Corporation Piston for an engine
JP2009025119A (ja) * 2007-07-19 2009-02-05 General Electric Co <Ge> 輪郭測定装置及び動作方法
EP2020541B1 (de) * 2007-08-01 2010-01-13 Carl Freudenberg KG Verfahren zur Herstellung eines Dichtrings
US9168613B2 (en) 2010-10-22 2015-10-27 Paul T. Colby Vertical laser cladding system
FR2977177B1 (fr) * 2011-06-30 2014-04-04 Chpolansky Ets Procede de rechargement d'une piece
US10751936B2 (en) * 2014-05-30 2020-08-25 Prima Industrie S.P.A. Laser operating machine for additive manufacturing by laser sintering and corresponding method
JP6783092B2 (ja) * 2016-08-12 2020-11-11 Dmg森精機株式会社 付加加工用ヘッドおよび加工機械
IT201600103343A1 (it) * 2016-10-14 2018-04-14 Prima Ind Spa Macchina operatrice laser per la produzione additiva tramite trattamento termico laser, in particolare fusione, e relativo procedimento
IT201600103310A1 (it) * 2016-10-14 2018-04-14 Prima Ind Spa Macchina operatrice laser per la produzione additiva tramite trattamento termico laser, in particolare fusione, e relativo procedimento
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EP4186616A4 (en) * 2020-07-22 2024-05-01 Nikon Corporation PROCESSING SYSTEM

Also Published As

Publication number Publication date
EP0435818A1 (de) 1991-07-03
JPH03198994A (ja) 1991-08-30
US5147999A (en) 1992-09-15
DE59006143D1 (de) 1994-07-21
ES2056430T3 (es) 1994-10-01

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